Fix when removing selected currency in select

src/components/modals/ImportAccounts/steps/01-step-choose-currency.js

@@ -1,6 +1,7 @@
 // @flow
 
 import React, { Fragment } from 'react'
+import isArray from 'lodash/isArray'
 
 import SelectCurrency from 'components/SelectCurrency'
 import Button from 'components/base/Button'
@@ -9,7 +10,16 @@ import CurrencyBadge from 'components/base/CurrencyBadge'
 import type { StepProps } from '../index'
 
 function StepChooseCurrency({ currency, setState }: StepProps) {
-  return <SelectCurrency onChange={currency => setState({ currency })} value={currency} />
+  return (
+    <SelectCurrency
+      onChange={currency => {
+        setState({
+          currency: isArray(currency) && currency.length === 0 ? null : currency,
+        })
+      }}
+      value={currency}
+    />
+  )
 }
 
 export function StepChooseCurrencyFooter({ transitionTo, currency, t }: StepProps) {